Hoisting-machine



(No Model.)

S. GRIFFITHS. 2 Sheets-Sheet 1.

HOISTING MACHINE.

Patented July 26, 1893.

Mel.)

S. GRIFFITH S.- v2 Sheets-Sheet 2. HOISTING MACHINE. No. 502,188. Patented July 25, 1893.

r l y UNITED STATES PATENT OFFICE.

SAMUEL GRIFFITHS, OF \VEIR, KANSAS.

HOISTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 502,188, dated July 25, 1893.

Application filed March 23, 1893.

To all whom it may sin/corn.-

Be it known that I, SAMUEL GRIFFITHS, a citizen of the United States, and a resident of Weir, in the county of Cherokee and State of Kansas, have invented certain new and useful Improvements in Hoisting-Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to hoisting machines for coal and other mines, being especiallyintended to provide improved means for automatically tilting the elevating cage when it reaches the top of the shaft, to dump the cars carried thereby and empty them of their contents.

The invention consists in the novel construction and combination of parts hereinafter fully described and specifically pointed out in the claims.

In the accompanying drawings: Figure 1 is a view of the upper portion of a mine-shaft showing the tilting platform elevated to dump a car. Fig. 2 is a horizontal section on the line 50-00, Fig. 3. Fig. 3 is a central longitudinal section of the elevating cage, showing the tilting platform depressed or on a level.

In the said drawings the reference numeral 1 designates the vertical props, which are connected together by cross-bars 2, as is usual in mine shafts, forming a rectangular framing or lining for the shaft within which the elevating cage is vertically movable.

The numeral 3 denotes two vertical guides on opposite sides of the shaft.

The hoisting cage comprises a bottom consisting of horizontal side bars or beams 4., 4, and end beams 5, 5, forming a rectangular frame. Upon the outer sides of the side beams, are cleats 6, which embrace the vertical guides 3. Secured to these side beams are two posts or uprights 7, connected together at their upper ends bya cross-beam 8, with which the elevating rope is connected. The ends of the cross-beams are bifurcated Serial No. 467,326. (No model.)

forming arms 9, which embrace the guides 3. Brace rods 10, are secured to the said cross beams and side beams.

The numeral 12 denotesa rectangular platform which rests upon the bottom of the cage, and has pivoted to its under side, near one end, one or more metal bars or rods 13, which are pivoted to bolts 14, secured to the end beam 5, at the opposite end of the frame. Upon the upper side of this platform aretwo parallel rails 15, having upwardly projecting flanges 16, on their inner sides. Pivoted to the upper side of the platform, at or near the center, is a lever 17, provided with an outwardly extending pivoted lug 18, near one end which is adapted to project through an aperture in the flange 16 of one of said rails. To the end of said lever is pivoted a link 19 connected with a lever 20, pivoted to the platform and provided with a pivoted lug 21, similar to lugs 18, and adapted to project through an aperture in the flange of the opposite rail. The lever near its opposite end is also provided with a similar lug 23. To one end of the said platform are pivoted two vertical bars 24, the upper ends of which are connected with levers 25, 25, fulcrumed in the cross-beam 8. The opposite ends of these levers are adapted to engage with pivoted stops 26, on the props 1.

The operation will be readily understood. When the cage is at the bottom of the shaft, ready to receive a car, the lever 17 is operated so as to force the lugs connected therewith inward, leaving the tracks 15 unobstructed so that the loaded cars can be readily run thereon. After the cars have been run on the tracks the said lever is actuated in a reverse direction causing the lugs to be projected through the apertures in the flanges of the rails outside of the wheels, thus retaining the car securely in place. The cage is now elevated until the free ends of the levers 25 strike the stops 26, which are located above the mouth of the shaft, at a proper distance, causing the said ends to be depressed and the opposite ends elevated, which in turn causes the platform to be tilted and the car to be dumped in a chute or other receptacle.

Having thus described my invention, what I claim is 1. In a hoisting machine, the combination with the hoisting cage, of the platform, and the pivoted bars connecting the same with the bottom of the cage, the uprights, the pivoted levers, the bars connecting said levers with the platform and the stops against which said levers are adapted to strike to tilt the platform, substantially as described.

2. In a hoisting machine, the combination with the cage, the uprights, the cross beam, and the levers pivoted to said cross beam, of the platform, the rods connecting the same with the platform, the pivoted bars connect- I 5 ing the platform and cage, the rails having upwardly extending flanges provided with apertures, the pivoted lever, the lugs pivoted thereto, and the link, lever, and lug connected with said lever, substantially as described.

In testimony that I claim the foregoing as my own I have hereunto atfixed my signature in presence of two witnesses.

SAMUEL GRIFFITHS.

WVitnesses:

J. W. HER-RON, GEO. W. CARRAWAY. 

